Former ABC managing director Michelle Guthrie and former chair Justin Milne speak exclusively to Four Corners, detailing the months leading up to the bitter breakdown at the top level of the national broadcaster.

A massive leak of documents being called the Paradise Papers provides fresh evidence of links between the highest levels of Donald Trump's administration and associates of Russian President Vladimir Putin.

The Paradise Papers are the largest leak in history with more than 13.4 million files revealing the workings of the tax haven industry. So who is the law firm at the centre of the leak and what do the documents reveal?